5Ö 



In one part of a large lagoon we passed, were great 

 numbers of Coscoroba Sitrois who challenged me with their 

 call of "Coscoroba!" when I got near. 



In the different museums of South-America which I 

 visited I found only fairly large chicks of Coscoroba Can- 

 dida which had lost the markings of the newly hatched 

 chicks. These young birds were yellowish grey. I am 

 therefore very much pleased to be able to figure, through the 

 kindness of the Duchess of Bedford, a newly hatched chick 

 of this species which was bred at Woburn. See pi. I and II. 



I have always regarded the so called Coscoroba Swan 

 as a gigantic Tree Duck and the character of the head 

 markings found on the chick go far to prove that I was 

 more or less correct in my surmise. 



In fact the markings on the chick figured combine the 

 markings of the Sliell Duck chick with those of the Tree 

 Duch. 



The headmarkings show a good deal of the characteris- 

 tics of the Tree-Duck chicks markings, whilst the pattern 

 on the body is almost identical with those found on a 

 chick in down of the Shell Duck. 



Thousands of Upland Geese {Chi. dispar) were running 

 everywhere and a good many Antarctic Ducks {A?ias cristata) 

 were on the margin and in the lake. 



All the birds were tame and I could ^^it quite near them. 



Having admired them for a while I rode on, and having 

 passed over some higher ground I came to another piece 

 of water, probably another arm of the same lagoon and 

 there great numbers of Blacknecked Sunns greeted my view. 



It was a lovely sight. In the water are some little islands 

 and everywhere are Blacknecked Surins with only an occa- 

 sional Coscoroba amongst them, so that it seems probable 

 that both species don't mix very much but keep apart. 

 On the little island, as I heard afterwards, the Blackfaced 

 Ibisses breed. 



The swans were tame like the Coscorobas and I could 

 ride to the margin of the lake without their taking wing. 



Having left the Blacknecks I ride on after my guide and 



Notes from the Leyden jMuseum, Vol. XXXV. 



